How to move to the next incision when image processing - marking an MRI scan using Macbook?

Question

Daniel 2024-1-16

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https://ww2.mathworks.cn/matlabcentral/answers/2070331-how-to-move-to-the-next-incision-when-image-processing-marking-an-mri-scan-using-macbook

回答： Shubh 2024-1-18

I wrote a code that opens the MRI scan as a figure, and tells me to remove the unwanted tissue as presented in the picture.

After i marke the area i want to remove, i am supposed to double click on the dark blue area so it will move to the next insicion so i can fix the dots on the next one and so on. the double click works well on Windows, unfortunately it doesnt work on Mac. Does anyone came accross this situation or knows what should i do to move to the next figure on Mac?

Thank you

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Answer 1

Shubh 2024-1-18

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https://ww2.mathworks.cn/matlabcentral/answers/2070331-how-to-move-to-the-next-incision-when-image-processing-marking-an-mri-scan-using-macbook#answer_1392406

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Hi Daniel,

It seems you're encountering an issue with MATLAB's interactive figure behavior differing between Windows and Mac operating systems, particularly with double-click functionality. This might be due to variations in how mouse events are handled across these platforms.

To address this, I suggest implementing a platform-independent approach that ensures consistent behavior on both Windows and Mac. A common method is to use keyboard callbacks along with mouse callbacks. For instance, you can use a specific key press (like the 'n' key for "next") to proceed to the next incision after marking the area on the MRI scan.

Here's an example of how you can modify your MATLAB code to include this functionality:

function mri_tissue_removal
    % Example MRI data (replace with your own MRI data)
    mriData = {rand(100, 100), rand(100, 100), rand(100, 100)}; % Replace with actual MRI data
    % Initialize figure
    hFig = figure;
    numScans = length(mriData);
    currentScan = 1;
    % Display first scan
    displayScan(mriData{currentScan});
    % Set up callbacks
    set(hFig, 'WindowKeyPressFcn', @keyPressCallback);
    set(hFig, 'ButtonDownFcn', @mouseClickCallback);
    % Function to display the scan
    function displayScan(scanData)
        imshow(scanData, []);
        title(sprintf('Scan %d of %d', currentScan, numScans));
    end
    % Key press callback
    function keyPressCallback(src, event)
        switch event.Key
            case 'n'  % 'n' for next scan
                if currentScan < numScans
                    currentScan = currentScan + 1;
                    displayScan(mriData{currentScan});
                else
                    disp('No more scans to display.');
                end
        end
    end
    % Mouse click callback (for additional functionality)
    function mouseClickCallback(~, ~)
        % Implement your logic for mouse clicks here
        disp('Mouse clicked');
    end
end

In this code:

mri_tissue_removal is the main function that you call to start the process.
Replace mriData with your actual MRI data.
displayScan function displays the current MRI scan.
The keyPressCallback function listens for key presses. Pressing 'n' will move to the next scan.
The mouseClickCallback function is where you can add your logic for handling mouse clicks (for marking areas).
The current scan is updated and displayed when 'n' is pressed.